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Finding the Fourth Proportional to 157,855.51, 217,843.82 and 86,240.17

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Solution

The fourth proportional to 157,855.51, 217,843.82 and 86,240.17 is: 119,013.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,855.51 : 217,843.82 = 86,240.17 : x
  2. Step 2: Convert to fraction form
    157,855.51/217,843.82 = 86,240.17/x
  3. Step 3: Cross multiply
    157,855.51x = 217,843.82 × 86,240.17
  4. Step 4: Simplify right side
    157,855.51x = 18,786,887,639.05
  5. Step 5: Solve for x
    x = 18,786,887,639.05/157,855.51
  6. Step 6: Final answer
    x = 119,013.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.